What is homeostasis?
In GCSE biology, homeostasis is the maintenance of a constant internal environment. Internal conditions are maintained within narrow limits despite any changes in the external environment. Homeostatic mechanisms inside the body act to reverse any change from an ideal set point, ensuring that conditions remain constant, e.g. core body temperature must be kept at the optimum temperature for enzyme function.
Internal conditions are regulated by the nervous system and the action of hormones. Examples of homeostasis include blood glucose regulation, temperature regulation (thermoregulation) and the regulation of blood water content (osmoregulation).
Homeostasis revision resources to ace your exams
You can explore homeostasis further using our GCSE revision notes, topic questions and flashcards for your specific exam board:
Meet all your GCSE biology revision needs using our revision resources linked below. This includes revision notes, videos, flashcards and exam questions with student-friendly mark schemes.
Sign up for articles sent directly to your inbox
Receive news, articles and guides directly from our team of experts.
Share this article
written revision resources that improve your